NASA astronaut Scott Kelly is about to come home — here are 8 epic numbers about his record-breaking time in space

On March 1, astronaut and Instagram star Scott Kelly returned to Earth after spending 340 days in space, a record for a NASA astronaut.

Kelly's nearly year in space has been a critical mission for NASA, helping to reveal details that will be key to future missions to Mars.

For example, understanding how the human body reacts to long-term stays in zero gravity will be crucial.

During his time in space, Kelly drank nearly 200 gallons of recycled urine and sweat and traveled over 140 million miles, according to The New York Times. Here are some more extreme numbers from The Times about Kelly's historic time in space:

915,000 Twitter followers, which he interacted with more than 2,000 times. Here's his Twitter profile picture:

5,440 orbits around Earth, while traveling at over 17,000 mph.

10,944 sunrises and sunsets — the same number the average human experiences in about 30 years.

648 miles — on the ISS treadmill. To minimize the loss of muscle and bone mass in space, astronauts exercise a lot. Kelly logged more than 700 hours of exercise.

Astronaut Sunita Williams exercises aboard the ISS.NASA

193 gallons of recycled sweat and urine. Water is heavy and expensive to transport to space. Instead of lugging a bunch of fresh H20 with them, astronauts recycle their urine and sweat to drink. Kelly downed close to 200 gallons' worth.

NASA

400 science experiments conducted.

NASA

143,846,525 miles of total travel in the ISS. That's about the same distance as a one-way trip to Mars, according to The New York Times.